@QuinnyPig Reinterating my story from Hurricane Sandy.

Was consulting at a small internet service company when Sandy hit. First projected landfall was right into DC / Northern Virginia. Projected eyewall track over all the us-east-1 datacenters I think. Our stuff was all there. 1/
@QuinnyPig 2/ So we quickly stand up configuration management server in AWS Oregon. Ok. Can rebuild site from private Github + CM; just need DNS switch. Done.

Had horrible feeling, called GitHub. “Are you by any chance in us-east-1?”
“Yes.”
“Only us-east-1?”
“Yes, why do you ask?”
@QuinnyPig 3/ We tell GitHub to look at the weather report and copy their infrastructure backups out of the projected storm track. Much hilarity ensues.

We rapidly download whole repo structure to every admins laptop. Ok.
@QuinnyPig 4/ All better. Wait. Failover also requires DNS change. Look up our DNS provider in AWS netblocks list. Ping. Call DNS provider.

“Are you in us-east-1?”
“Yes.”
“Only in us-east-1?”
“Yes why?”

We explain. Poignant pause. “Our office is in Delaware, too.”

Much hilarity ensues.
@QuinnyPig 5/ So they start DR prep, we add a slave nameserver in Oregon & add that to our domain NS records at registrar… who we call and they aren’t *just* in us-east-1 (“Why do you ask?…” … much hilarity ensues).

Fortunately for everyone but New York City hurricane drifts north.

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More from @GeorgeWHerbert

3 Oct 20
Friday was Danger Day. 11 years ago at this time, I was leading an extremely uncomfortable outage assessment WebEx session, moreso because I didn’t technically consult there anymore and there had been some hands waved.

en.m.wikipedia.org/wiki/2009_Side…
Around 1am was when the Oracle guy watched the last disk scan for Oracle ASM headers on the LUNs on the Hitachi come back negative and indicated they couldn’t help under the circumstances.

Then the poor T-mobile DBA said “We’re fucked.”
I had rolled back off before the disk array was repaired, the story being relayed later that a firmware upgrade reverse reordered every disk in 24-disk RAID groups and the data strangely became unavailable. That’s secondhand.
Read 12 tweets
4 Aug 20
@fab_hinz Ok, I get 620 meters from there to center of explosions warehouse. Popping some formulas...
@fab_hinz If we call that 2-3 PSI there (concrete block perimeter wall partly collapsed) ... 3 PSI would give:
0.62 = y^0.33 x 1.0
y^0.33 = 0.62
y = .238 kilotons, about 240 tons TNT equivalent
@fab_hinz If it’s 2 PSI then:
0.62 = y^0.33 x 1.5
y = 0.070 kt, about 70 tons TNT equivalent.

If we check 5 PSI as outside limit,
0.62 = y^0.33 x 0.71
y = 0.665 kt, 665 tons TNT equivalent
Read 9 tweets
7 Jul 20
Project Covidville

This is a new project I’m starting in order to help bring home the impact of the COVID-19 pandemic on America. The premise is simple: the fastest growing US city today is the City of #Covidville , populated by our recently dead.
1/
Each day, we’ll look at how #Covidville grows and the cities that it passes. We’ll use CDC total US Coronavirus deaths statisics ( cdc.gov/coronavirus/20… ) and estimated 2019 US Cities population rankings in Wikipedia ( en.m.wikipedia.org/wiki/List_of_U… )
2/
Also using WHO historical data for US (for references, see the Wikipedia page for pandemic deaths over time at en.wikipedia.org/wiki/COVID-19_… ) #Covidville

For example, May 30 we passed 100,000 deaths in the US (100,304).
3/
Read 855 tweets
27 Jun 20
Meta-commentary about the Russian bounties on US troops thing.

I’m assuming it’s real, fooling the national security reporter ms at NTY and Washington Post simultaneously is possible but really difficult. DOD and Intelligence sources not widely rebutting the claims now.
2/ It’s not surprising that it would be kept secret for a time. Intelligence and the military and leadership would want to verify as strongly as possible. The consequences of a half baked response to a mistaken report is immense.

Presumably it was by now adequately confirmed.
3/ That it leaked, now, is telling. Several people inside government were willing to at least confirm its existence and likely multiple people actually reached out to reporters. They’re people whose jobs and futures are on the line over leaks this sensitive.
Read 13 tweets
2 Oct 19
@nktpnd @NuclearAnthro @wslafoy @mgerrydoyle 😳🙄😂 ok. I’ll do an explainer in a bit now that I’m home and have food
@nktpnd @NuclearAnthro @wslafoy @mgerrydoyle Ok. Short Thread: What's the "Flat Earth" approximation in missile trajectories, and why I'd use and mention it.
@nktpnd @NuclearAnthro @wslafoy @mgerrydoyle So, we all should know that the Earth is a sphere (approximately) and about 40,000 kilometers in circumference. The radius is about 6,400 kilometers. A quarter of the way around is 10,000 kilometers.

Flat Earth simplification assumes we temporarily ignore that it's curved.
Read 12 tweets
1 Oct 19
Brief explainer thread on the Chinese DF-17 Hypersonic Glide Vehicles and why they matter.

These puppies.
@nktpnd @ArmsControlWonk @divert_thruster @DuitsyWasHere etc
1/
If you follow North Korea a lot, you saw these only a month or two ago. 2/
Those are tagged KN-23 for now, until North Korea gives us their internal name.

Those are a hypersonic gliding steered maneuvering missile. Can change flightpaths and glide a long ways near the top of the atmosphere. 3/
Read 9 tweets

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